General:
Perennial herb from a creeping rhizome; finely-hairy throughout, rarely with longer spreading hairs; stems erect, simple or branched above, 30-70 cm tall, 4-angled.

Leaves:
All stem leaves; opposite, lanceolate to broadly egg-shaped, 2.5-8 cm long, 1-3 cm wide, more or less sharply toothed; stalks to 1.5 cm long.

Flowers:
Inflorescence a single, large, terminal, head-like cluster, closely surrounded by leaf-like bracts; corollas tubular, 2.5-3.5 cm long, purple, finely-hairy, strongly 2-lipped, the upper lip narrow and arc-shaped and bearded at tip, the lower lip spreading and 3-lobed; calyces tubular, 7-11 mm long, the teeth only 1 mm long, the opening white-hairy within and sometimes also outside, 15-veined.

Fruits:
Nutlets, 4 clustered together, oblong, smooth.

Notes:
Two sympatric varieties occur in BC:

1. Leaves with stalks to 1.5 cm long; stems usually branched above................ var. mollis (L.) Benth.

1. Leaves with stalks less than 0.5 cm long; stems usually simple.................. var. menthaefolia (Grah.) Fern.

Source:  The Illustrated Flora of British Columbia

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Illustration Source:  The Illustrated Flora of British Columbia